This engine is well-known for its rod bearing failures.[1] The S85 and S65 from the E9X series M3 share this rod bearing issue, and can lead to catastrophic engine failure if it is not addressed. Another major issue with this engine is the throttle actuators, which is usually attributed to the gears located inside the actuators, however, electronic failure of the actuators themselves is not uncommon.[2]
- ^ "The 4 Most Common BMW S85 M5/M6 Engine Problems - BMW Tuning". BMW Tuning - BMW Performance & Tuning Guides, News, Videos. 2020-08-13. Retrieved 2021-02-26.
- ^ "The 4 Most Common BMW S85 M5/M6 Engine Problems - BMW Tuning". BMW Tuning - BMW Performance & Tuning Guides, News, Videos. 2020-08-13. Retrieved 2021-02-26.